Exiv2

I wanted to have a method like ExifTags::taglist or IptcDataSets::dataSetList to get all XMP-tags. Based on printProperties I have added following code to properties.cpp. I am not sure if the condition in the while-loop is a good way to get all sets.

void XmpProperties::printAllProperties(std::ostream& os)
  {
    //Exiv2::XmpPropertyInfo* ii = Exiv2::xmpNsInfo;//[0]->xmpPropertyInfo_;
    int k = 0;
    while (xmpNsInfo[k].xmpPropertyInfo_ != 0)
    {
        const XmpPropertyInfo* pl = propertyList(xmpNsInfo[k].prefix_);
            if (pl) {
                for (int i = 0; pl[i].name_ != 0; +i) {
                    os << "Xmp." << xmpNsInfo[k].prefix_ << "." << pl[i];
                }
            }
        k+;
    }
  }